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Title: In-situ high-energy X-ray characterization of neutron irradiated HT-UPS stainless steel under tensile deformation

Abstract

Here, the tensile deformation behavior of a high-temperature, ultrafine-precipitate strengthened (HT-UPS) stainless steel was characterized in-situ with high-energy X-ray diffraction at 20 and 400 °C. The HT-UPS samples were neutron irradiated to 3 dpa at 400 °C. Significant irradiation hardening and ductility loss were observed at both temperatures. Lattice strain evolutions of the irradiated samples showed a strong linear response up to near the onset of the macroscopic yield, in contrast to the unirradiated HT-UPS which showed a pronounced non-linear behavior well below the macroscopic yield. While the room temperature diffraction elastic moduli in the longitudinal direction increased after irradiation, the 400 degrees C moduli were similar before and after irradiation. The evolution of the {200} lattice strain parallel to the loading axis (εL{200}) showed unique characteristics: in the plastic regime, the evolution of (εL{200}) after yield is temperature-dependent in the unirradiated specimens but temperature-independent in the irradiated specimens; and the value of (εL{200}) at the yield is an irradiation-sensitive, temperature-independent . parameter. The evolution of (εL{200}) corresponds well with the dislocation density evolution, and is an effective probe of the deformation-induced long-range internal stresses in the HT-UPS steel.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [2];  [2];  [2];  [2];  [2];  [3]
  1. Univ. of Florida, Gainesville, FL (United States); Argonne National Lab. (ANL), Lemont, IL (United States)
  2. Argonne National Lab. (ANL), Lemont, IL (United States)
  3. Univ. of Florida, Gainesville, FL (United States)
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE), Nuclear Energy Enabling Technologies (NEET); USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1482550
Alternate Identifier(s):
OSTI ID: 1601045
Grant/Contract Number:  
AC02-06CH11357; AC07-051D14517
Resource Type:
Accepted Manuscript
Journal Name:
Acta Materialia
Additional Journal Information:
Journal Volume: 156; Journal Issue: C; Journal ID: ISSN 1359-6454
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; HT-UPS austenitic stainless steel; In-situ high-energy X-ray diffraction; Neutron irradiation effect; Deformation mechanisms

Citation Formats

Xu, Chi, Zhang, Xuan, Chen, Yiren, Li, Meimei, Park, Jun -Sang, Kenesei, Peter, Almer, Jonathan, and Yang, Yong. In-situ high-energy X-ray characterization of neutron irradiated HT-UPS stainless steel under tensile deformation. United States: N. p., 2018. Web. doi:10.1016/j.actamat.2018.07.008.
Xu, Chi, Zhang, Xuan, Chen, Yiren, Li, Meimei, Park, Jun -Sang, Kenesei, Peter, Almer, Jonathan, & Yang, Yong. In-situ high-energy X-ray characterization of neutron irradiated HT-UPS stainless steel under tensile deformation. United States. https://doi.org/10.1016/j.actamat.2018.07.008
Xu, Chi, Zhang, Xuan, Chen, Yiren, Li, Meimei, Park, Jun -Sang, Kenesei, Peter, Almer, Jonathan, and Yang, Yong. Fri . "In-situ high-energy X-ray characterization of neutron irradiated HT-UPS stainless steel under tensile deformation". United States. https://doi.org/10.1016/j.actamat.2018.07.008. https://www.osti.gov/servlets/purl/1482550.
@article{osti_1482550,
title = {In-situ high-energy X-ray characterization of neutron irradiated HT-UPS stainless steel under tensile deformation},
author = {Xu, Chi and Zhang, Xuan and Chen, Yiren and Li, Meimei and Park, Jun -Sang and Kenesei, Peter and Almer, Jonathan and Yang, Yong},
abstractNote = {Here, the tensile deformation behavior of a high-temperature, ultrafine-precipitate strengthened (HT-UPS) stainless steel was characterized in-situ with high-energy X-ray diffraction at 20 and 400 °C. The HT-UPS samples were neutron irradiated to 3 dpa at 400 °C. Significant irradiation hardening and ductility loss were observed at both temperatures. Lattice strain evolutions of the irradiated samples showed a strong linear response up to near the onset of the macroscopic yield, in contrast to the unirradiated HT-UPS which showed a pronounced non-linear behavior well below the macroscopic yield. While the room temperature diffraction elastic moduli in the longitudinal direction increased after irradiation, the 400 degrees C moduli were similar before and after irradiation. The evolution of the {200} lattice strain parallel to the loading axis (εL{200}) showed unique characteristics: in the plastic regime, the evolution of (εL{200}) after yield is temperature-dependent in the unirradiated specimens but temperature-independent in the irradiated specimens; and the value of (εL{200}) at the yield is an irradiation-sensitive, temperature-independent . parameter. The evolution of (εL{200}) corresponds well with the dislocation density evolution, and is an effective probe of the deformation-induced long-range internal stresses in the HT-UPS steel.},
doi = {10.1016/j.actamat.2018.07.008},
journal = {Acta Materialia},
number = C,
volume = 156,
place = {United States},
year = {Fri Jul 06 00:00:00 EDT 2018},
month = {Fri Jul 06 00:00:00 EDT 2018}
}

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Cited by: 16 works
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Works referencing / citing this record:

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